AMC2 Site Information Form (site log) International GNSS Service See Instructions at: ftp://igscb.jpl.nasa.gov/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Tatevik Shakhbandaryan Date Prepared : 2014-09-15 Report Type : UPDATE If Update: Previous Site Log : amc2_20130314.log Modified/Added Sections : 0,10.2 1. Site Identification of the GNSS Monument Site Name : Alternate Master Clock (UTC calibrated) Four Character ID : AMC2 Monument Inscription : no monument, GPS antenna ARP IERS DOMES Number : 40472S004 CDP Number : none Monument Description : unknown Height of the Monument : Monument Foundation : Foundation Depth : Marker Description : Date Installed : 1998-10-15 Geologic Characteristic : Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : The antenna is mounted on top of the roof : (flat) of Building 400 (5 stories) at Schriever : Air Force Base, outside of Colorado Springs, : Colorado. There are no nearby geodetic markers : or control points. 2. Site Location Information City or Town : Colorado Springs State or Province : Colorado Country : United States Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : -1248596.252 Y coordinate (m) : -4819428.284 Z coordinate (m) : 3976506.034 Latitude (N is +) : +384811.25 Longitude (E is +) : -1043128.54 Elevation (m,ellips.) : 1912.4898 Additional Information : Schriever Air Force Base 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T247 Firmware Version : 3.2.32.4 Elevation Cutoff Setting : Date Installed : 1998-03-24 Date Removed : 1998-10-15T22:01Z Temperature Stabiliz. : Additional Information : 3.2 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T245 Firmware Version : 3.2.32.4 Elevation Cutoff Setting : Date Installed : 1998-10-15T22:01Z Date Removed : 1999-03-08T18:54Z Temperature Stabiliz. : Additional Information : 3.3 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 247-U Firmware Version : 3.3.32.2 Elevation Cutoff Setting : Date Installed : 1999-03-09T00:00Z Date Removed : 1999-05-10T17:48Z Temperature Stabiliz. : Additional Information : 3.4 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 245-U Firmware Version : 3.3.32.2 Elevation Cutoff Setting : Date Installed : 1999-05-11T00:00Z Date Removed : 1999-09-01T15:09Z Temperature Stabiliz. : Additional Information : 3.5 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 247-U Firmware Version : 3.3.32.3 Elevation Cutoff Setting : Date Installed : 1999-09-01T15:43Z Date Removed : 2000-07-10T20:39Z Temperature Stabiliz. : Additional Information : 3.6 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 247-U Firmware Version : 3.3.32.4 Elevation Cutoff Setting : Date Installed : 2000-07-10T20:50Z Date Removed : 2002-06-21T00:00Z Temperature Stabiliz. : Additional Information : firmware update only; no other change 3.7 Receiver Type : ASHTECH Z-XII3T Satellite System : GPS Serial Number : RT920013101 Firmware Version : IL01-1D04-MCF-12MX Elevation Cutoff Setting : Date Installed : 2002-07-03T17:21Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : Additional Information : All pseudo-range data produced are calibrated : to UTC(USNO) via the USNO Alternate Master : Clock (AMC) which is typically maintained to : 1 nanosecond (1 sigma) of the Primary USNO : Master Clock in Washington DC. No additional : calibration corrections need to be applied to : the RAW data set. 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+SBAS) Serial Number : (A20, but note the first A5 is used in SINEX) Firmware Version : (A11) Elevation Cutoff Setting : (deg) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : (multiple lines) 4. GNSS Antenna Information 4.1 Antenna Type : AOAD/M_T NONE Serial Number : 308 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0 Marker->ARP North Ecc(m) : Marker->ARP East Ecc(m) : Alignment from True N : oriented North but not measured deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1998-03-24 Date Removed : 2002-06-14T16:50Z Additional Information : This antenna is located 28.5 inches nearly : directly north of the antenna for a TTR-4P : timing receiver. NIMA surveyed the TTR-4P : antenna location in August 1996 with the : following results - : 38 Degrees 48.2 N ( 38.803107222 N) : 255 Degrees 28.5 W (255.475404583 E) : 1911.087 m Ellipsoid Height : with a stated accuracy of +/- 30 cm (1 sigma) : in each component. The TurboRogue antenna : is mounted on a tripod platform. : Antenna cable 25-AUG-1999 to present - : Andrew FSJ1-50A (35422-33 phase stabilized) : 1/4 inch Superflexible Foam Dielectric : Heliax -- physical length 120 feet : (36.57 m), mostly run in ceiling and : floor of Bldg 400; measured electrical : length is 146.9 ns +/- 30 ps : specifications - : Velocity factor 0.84 : DC resistance 2 to 3 ohms per 1000 foot : Capacitance, 24.2 pF/foot : Inductance, .061 uH/foot : Loss at 1250 MHz 6.77 dB/100 foot : Loss at 1500 MHz 7.47 dB/100 foot : Electrical Length Change verses Temperature - : 400 PPM over (-40 to 30 C) or 5.7 PPM/C : => 0.02 ps/m/C 4.2 Antenna Type : AOAD/M_T NONE Serial Number : KW-5-0001 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0 Marker->ARP North Ecc(m) : Marker->ARP East Ecc(m) : Alignment from True N : oriented North but not measured deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Andrew FSJ1-50A (35422-33 phase stabilized) Antenna Cable Length : 36.57 m Date Installed : 2002-06-14T16:51Z Date Removed : 2007-10-01T18:00Z Additional Information : This antenna is located 28.5 inches nearly : directly north of the antenna for a TTR-4P : timing receiver. NIMA surveyed the TTR-4P : antenna location in August 1996 with the : following results - : 38 Degrees 48.2 N ( 38.803107222 N) : 255 Degrees 28.5 W (255.475404583 E) : 1911.087 m Ellipsoid Height : with a stated accuracy of +/- 30 cm (1 sigma) : in each component. The TurboRogue antenna : is mounted on a tripod platform. : This antenna is a standard AOAD/M_T using a : special LNA designed to have a flat group : delay response at both L1 and L2. Because : of this flat group delay response the thermal : sensitivity of this antenna should be much : improved over the what is typically : found in this antenna type. : Antenna Group Delay at L1 = 23.47 NS : Antenna Group Delay at L2 = 24.92 NS : Antenna cable 25-AUG-1999 to present - : Andrew FSJ1-50A (35422-33 phase stabilized) : 1/4 inch Superflexible Foam Dielectric : Heliax -- physical length 120 feet : (36.57 m), mostly run in ceiling and : floor of Bldg 400; : specifications - : Velocity factor 0.84 : DC resistance 2 to 3 ohms per 1000 foot : Capacitance, 24.2 pF/foot : Inductance, .061 uH/foot : Loss at 1250 MHz 6.77 dB/100 foot : Loss at 1500 MHz 7.47 dB/100 foot : Electrical Length Change versus Temperature - : 400 PPM over (-40 to 30 C) or 5.7 PPM/C : => 0.02 ps/m/C : Antenna splitter - USNO specially designed : antenna splitter that has > 80 db port to : port isolation and flat group delay : response. : Antenna splitter cable - from splitter to : receiver. : The Antenna splitter cable is attached to : a DC block and 20db PAD at the receiver input : to improve impedance matching. The measured : delays through each component of the system : are summarized in the table below - : L1(ns) L2(ns) : --------- --------- : antenna 23.47 24.92 : antenna cable 146.9 146.9 : antenna splitter 6.21 6.5 : cable to receiver 7.58 7.58 : DC block and 20db : PAD 0.50 0.50 : receiver w/ a : +27.0 ns delay : between on-time : signal and : 20MHZ. 267.4 278.6 : Note - These delay have already been added : to RAW psudorange data and they should : not be added to any solutions. 4.3 Antenna Type : AOAD/M_T NONE Serial Number : KW5-0201 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0 Marker->ARP North Ecc(m) : Marker->ARP East Ecc(m) : Alignment from True N : oriented North but not measured deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Andrew FSJ1-50A (35422-33 phase stabilized) Antenna Cable Length : 36.57 m Date Installed : 2007-10-01T18:35Z Date Removed : CCYY-MM-DDThh:mmZ Additional Information : This antenna is located 28.5 inches nearly : directly north of the antenna for a TTR-4P : timing receiver. NIMA surveyed the TTR-4P : antenna location in August 1996 with the : following results - : 38 Degrees 48.2 N ( 38.803107222 N) : 255 Degrees 28.5 W (255.475404583 E) : 1911.087 m Ellipsoid Height : with a stated accuracy of +/- 30 cm (1 sigma) : in each component. The TurboRogue antenna : is mounted on a tripod platform. : This antenna is a standard AOAD/M_T using a : special LNA designed to have a flat group : delay response at both L1 and L2. Because : of this flat group delay response the thermal : sensitivity of this antenna should be much : improved over the what is typically : found in this antenna type. : Antenna Group Delay at L1 = 25.13 NS : Antenna Group Delay at L2 = 25.45 NS : Antenna cable 25-AUG-1999 to present - : Andrew FSJ1-50A (35422-33 phase stabilized) : 1/4 inch Superflexible Foam Dielectric : Heliax -- physical length 120 feet : (36.57 m), mostly run in ceiling and : floor of Bldg 400; : specifications - : Velocity factor 0.84 : DC resistance 2 to 3 ohms per 1000 foot : Capacitance, 24.2 pF/foot : Inductance, .061 uH/foot : Loss at 1250 MHz 6.77 dB/100 foot : Loss at 1500 MHz 7.47 dB/100 foot : Electrical Length Change versus Temperature - : 400 PPM over (-40 to 30 C) or 5.7 PPM/C : => 0.02 ps/m/C : Antenna splitter - USNO specially designed : antenna splitter that has > 80 db port to : port isolation and flat group delay : response. While troubleshooting, the splitter : was replaced on 9/26/07T21:35, but no improvment : was noticed. : Antenna splitter cable - from splitter to : receiver. : The Antenna splitter cable is attached to : a DC block and 20db PAD at the receiver input : to improve impedance matching. The measured : delays through each component of the system : are summarized in the table below - : L1(ns) L2(ns) : --------- --------- : antenna 25.13 25.45 : antenna cable 146.9 146.9 : antenna splitter 7.83 7.96 : cable to receiver 7.58 7.58 : DC block and 20db : PAD 0.50 0.50 : receiver w/ a : +27.0 ns delay : between on-time : signal and : 20MHZ. 267.4 278.6 : Note - These delays have already been added : to RAW psudorange data and they should : not be added to any solutions. 4.x Antenna Type : (A20, from rcvr_ant.tab; see instructions) Serial Number : (A*, but note the first A5 is used in SINEX) Antenna Reference Point : (BPA/BCR/XXX from "antenna.gra"; see instr.) Marker->ARP Up Ecc. (m) : (F8.4) Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : (deg; + is clockwise/east) Antenna Radome Type : (A4 from rcvr_ant.tab; see instructions) Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 5. Surveyed Local Ties 5.x Tied Marker Name : Tied Marker Usage : (SLR/VLBI/LOCAL CONTROL/FOOTPRINT/etc) Tied Marker CDP Number : (A4) Tied Marker DOMES Number : (A9) Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Survey method : (GPS CAMPAIGN/TRILATERATION/TRIANGULATION/etc) Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : EXTERNAL H-MASER Input Frequency : 5 MHz Effective Dates : 1998-03-24/CCYY-MM-DD Notes : reference signal from USNO Alternate Master : Clock #1, the back-up realization of UTC(USNO) : via two-way satellite time transfer; : All calibration delays have already been : accounted for in the RAW pseudorange data : produced by AMC2. 6.x Standard Type : (INTERNAL or EXTERNAL H-MASER/CESIUM/etc) Input Frequency : (if external) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 7. Collocation Information 7.x Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/TIME/etc) Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1.1 Humidity Sensor Model : HUMICA H-sensor (pn 16663) Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 sec Accuracy (% rel h) : 1%(0...90%RH) Aspiration : Height Diff to Ant : Calibration date : (CCYY-MM-DD) Effective Dates : 2002-02-28/CCYY-MM-DD Notes : NOAA GSOS # 064 : Horizontal offset from GPS 527 : Vertical offset from GPS ~29 8.1.x Humidity Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy (% rel h) : (% rel h) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.2.1 Pressure Sensor Model : PTB220 Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 sec Accuracy : 0.1 hPa Height Diff to Ant : ~29 m Calibration date : (CCYY-MM-DD) Effective Dates : 2002-02-28/CCYY-MM-DD Notes : NOAA GSOS # 064 : Horizontal offset from GPS ~527 : Vertical offset from GPS ~29 8.2.x Pressure Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (hPa) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.3.1 Temp. Sensor Model : PT100 RTD 1/s DIN 43760B Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 sec Accuracy : 0.1 @ 20.0 deg C Aspiration : Height Diff to Ant : Calibration date : Effective Dates : 2002-02-28/CCYY-MM-DD Notes : NOAA GSOS # 064 : Horizontal offset from GPS ~527 : Vertical offset from GPS ~29 8.3.x Temp. Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (deg C) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.4.x Water Vapor Radiometer : Manufacturer : Serial Number : Distance to Antenna : (m) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.5.1 Other Instrumentation : The USNO Alternate Master Clock is located in : the same building as this GPS receiver. The : differential time offset between the Alternate : Master Clock and the GPS antenna will be : monitored and may be used to calibrate the : receiver clock time directly to UTC(AMC). 8.5.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degradations : (SN RATIO/DATA GAPS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.2.x Multipath Sources : (METAL ROOF/DOME/VLBI ANTENNA/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.x Signal Obstructions : (TREES/BUILDINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 10. Local Episodic Effects Possibly Affecting Data Quality 10.1 Date : 2013-03-11/2013-03-11 Event : Computer replaced. There was a data outage : from 16:45 - 23:59. 10.2 Date : 2014-09-10/2014-09-10 Event : Transitioned from .soc to .ash data types. For : soc data types used soc2rnx to do the : conversion to RINEX data. For ash data types : using teqc directly to do the conversion to : RINEX. : Also applying clock calibration to .ash derived : RINEX data. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : U.S. Naval Observatory, Alternate Master Clock Preferred Abbreviation : USNO/AMC Mailing Address : USNO/AMC : 400 O'Malley Ave, Suite 44 : Schriever AFB, CO 80912-4044 Primary Contact Contact Name : Bill Bollwerk Telephone (primary) : 719-567-6740 Telephone (secondary) : 202-359-6011 Fax : E-mail : bill.bollwerk@usno.navy.mil Secondary Contact Contact Name : Ed Powers (USNO) Telephone (primary) : 202-762-1451 Telephone (secondary) : Fax : 202-762-1511 E-mail : edward.powers@usno.navy.mil Additional Information : Regional Data Center is JPL : Dave Stowers (JPL) : 818-354-7055 : 818-393-4965 : dstowers@jpl.nasa.gov 12. Responsible Agency (if different from 11.) Agency : U.S. Naval Observatory Preferred Abbreviation : USNO Mailing Address : Time Service Department : 3450 Massachusetts Ave., NW : Wasington, D.C. 20392-5420 Primary Contact Contact Name : Ed Powers (USNO) Telephone (primary) : 202-762-1451 Telephone (secondary) : Fax : 202-762-1511 E-mail : edward.powers@usno.navy.mil Secondary Contact Contact Name : Francine Vannicola(USNO) Telephone (primary) : 202-762-1455 Telephone (secondary) : Fax : 202-762-1511 E-mail : francine.vannicola@usno.navy.mil Additional Information : 13. More Information Primary Data Center : JPL Secondary Data Center : CDDIS URL for More Information : Hardcopy on File Site Map : N Site Diagram : N Horizon Mask : N Monument Description : no monument Site Pictures : N Additional Information : Antenna Graphics with Dimensions TurboRogue: DORNE MARGOLIN T ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 ARP=BPA <-- 0.381 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering TGP: Top of Ground Plane BGP: Bottom of Ground Plane TPA: Top of Preamplifier BPA: Bottom of Preamplifier TOP: Top of Pole